Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"gian hieu da snippets" » "gian viet da snippets", "van hieu da snippets", "tin hieu da snippets", "gian hieu dac snippets", "gian hieu dia snippets", "gian hieu va snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("gian hieu da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("gian hieu da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( gian hieu da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("gian hieu da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.